BL Thermowell
Fixed-thread thermowell, integral/steel tube type, straight or tapered, with optional wear- and corrosion-resistant treatments such as surfacing welding, spray welding and PTFE lining.
- Original Factory Genuine, Tenfold Compensation for Counterfeits
- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The BL type is a fixed-thread protection tube, connected to equipment or piping via thread, available in four structures: integral (01), steel tube (03), integral with extension (04), and steel tube with extension (05). Surface treatments such as cobalt-based alloy weld overlay, tungsten carbide weld overlay, cobalt-based alloy spray welding, PTFE lining, enamel baking, and tantalum lining are available to suit wear and corrosive conditions. Mounting threads cover M20×1.5, M27×2, M33×2 and NPT, ZG, G series, directly compatible with thermocouples, RTDs and bimetallic thermometers.
| Parameter Name | Technical Specifications |
|---|---|
| Structure type | |
| Design | 01 Integral / 03 Steel tube / 04 Integral with extension / 05 Steel tube with extension |
| Protection tube profile | S Straight / T Tapered (BL01 type only) |
| Installation Method | Fixed thread |
| Size range | |
| Protection tube outer diameter | Straight Φ12～Φ25; Tapered Φ23/Φ18～Φ28/Φ23 (mm) |
| Mounting thread | M20×1.5 / M27×2 / M33×2 / NPT1/2"~1" / ZG1/2"~1" / G1/2"~1" |
| Applicable pressure | ≤10.4 MPa (depending on structure, diameter, wall thickness, insertion depth, temperature, flow rate and thread fit accuracy) |
| Insertion length | Multiples of 10 mm |
| Protection sleeve inner diameter | Φ7 / Φ8 / Φ10 (not specified for steel tube type) |
| Surface treatment | |
| Weld overlay | Cobalt-based alloy 1.2/3.0 mm, tungsten carbide 1.2/3.0 mm |
| Spray welding | Cobalt-based alloy |
| Coating | PTFE-lined (F), baked enamel (K), tantalum-lined 1 mm (FT) |
| Treatment length | 50 mm multiples (weld overlay length >500 mm supplied by agreement) |
- Threaded mounting, easy on-site disassembly and replacement
- Integral and steel-tube body options, balancing pressure resistance and cost
- Optional weld overlay, spray welding, PTFE lining, baked enamel, tantalum lining and other wear-resistant and anti-corrosion treatments
- Thread specifications cover metric, NPT, ZG and G series
- Extended-section design (04/05) suitable for pipes with thick insulation
- BL03 insertion depth should be ≥50 mm; weld overlay length >500 mm supplied by agreement
Temperature measurement of columns and piping in petrochemical plants
Screwed into the equipment port, fitted with thermocouple or RTD; cobalt-based alloy weld overlay resists erosion by media containing solid particles.
Temperature measurement of pharmaceutical and food equipment
Integral straight design with PTFE lining or electropolishing, meeting cleanliness and corrosion resistance requirements.
Need selection advice or bulk quotation?
Send us the working condition parameters (signal type, medium, range, pressure, temperature, connection method), and our engineers will provide a selection scheme and quotation within 1 working day.
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